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实测资料表明,黄河中上游干支流治理已经使下游的防洪形势发生变化,洪峰流量和年沙量大幅度减少,小浪底水库投入运用15年,下游河槽发生强烈冲刷,水位下降超过2m,生产堤的存在已经使22 000m3/s的设计洪水在花园口河段不漫滩,其防洪设计标准千年一遇。无论黄河水沙如何变化,都要经过小浪底水库调节进入下游,黄河窄深河槽具有极强的泄洪输沙能力。分析研究表明,小浪底水库进行多年调沙,相机利用洪水排沙,可长期发挥作用;下游游荡河段通过双岸整治形成高效排洪输沙通道输沙入海,继续冲刷河槽,可实现河床不抬高。建议修建桃花峪水库控制下游大洪水,并进一步纵向冲深河槽。
Measured data show that the management of the upper and lower reaches of the Yellow River has made the downstream flood control situation changes, flood peak flow and annual sediment decreased significantly, Xiaolangdi Reservoir into operation for 15 years, the downstream flume strong erosion, the water level dropped more than 2m, the production of dike Existence has been 22 000m3 / s design flood in the mouth of Huayuankou non-floodplain, the flood control design standard once in a thousand years. Regardless of how the water and sediment changes in the Yellow River, it must go through the regulation of Xiaolangdi Reservoir into the lower reaches. The narrow and deep fluvial channels of the Yellow River have extremely strong capacity of flood discharge and sediment transport. Analysis shows that the Xiaolangdi Reservoir can be used for many years to adjust the sand. The use of flood and sediment discharge by the camera can play a role for a long time. The downstream wandering reaches an efficient channel for flood discharge and sediment transport into the sea through double-bank remediation. high. It is proposed to construct the Taohuayu Reservoir to control the downstream floods and to further longitudinally rinse the river channel.